The electric blade sharpner I purchased from Nancy's Notion worked just fine for me once I read the instructions. Had been using it incorrectly so the blades weren't getting sharpened as they should. Now I sharpen my blades only once for fabric. When the blade gets dull again I'll sharpen them and use them in my "Paper Only" rotary cutter. They'll never go dull or not for a long time. After they do get dull I place them in the blade container they came in, once its full I toss it. Also found out my blades were getting dull with my old style cutting mat. Got a better cut on a self-healing mat so changed over to those. Now they last longer for me.